CD34 and cardiac hypertrophy: Further single‐cell pseudotime analysis, combined with in vitro cell culture studies, revealed the involvement of WNT‐β‐catenin and TGFβ1/SMAD pathways in regulating CD34+ cell differentiation into FBs.[115] Another SCS study of mouse and human hearts reveals that a population of non‐bone marrow‐derived Sca1+ cells differentiate into FBs during cardiac hypertrophy.